JPH0533248Y2 - - Google Patents

Description

[Detailed explanation of the idea]

[Industrial Application Fields] This invention applies to the types of attachments such as angle heads, universal heads, and rotary face plates that are attached to machine tools such as machining centers, horizontal boring machines, and plano mirrors, and the attachment angles relative to the spindle head. and a device for determining information regarding weight. [Background technology and its problems] In general, different types of attachments are used to attach to the spindle head of a machine tool depending on the processing purpose, and attachment angles to the spindle head are different. . The type of attachment or the mounting angle is determined by the worker or automatically by the attachment installation command, etc., but with the automation of machine tools, there is a tendency for the type of attachment to be automatically determined. be. By the way, when an attachment is attached to the spindle head, the spindle head is deformed by the weight of the attachment and machining errors occur, so it is necessary to perform weight correction prior to machining. This weight correction may be performed not only depending on the type of attachment but also on the mounting angle. Attachment identification is also used for attachment replacement commands, spindle rotational speed regulations, spindle extension regulations, tool design regulations, etc., so it needs to be done reliably and quickly. Discrimination of angle is not always sufficient. That is, conventionally, when an attachment is automatically attached to a spindle head, the type of attachment is determined based on a command, and weight correction regarding deflection of the spindle head is performed. Furthermore, the mounting angle of the attachment is determined based on the value stored in a sequencer, etc. that stores the previous mounting angle (indexing angle) based on an indexing command for determining the angle at which the attachment should be mounted, and this indexing command Upon completion of the process, the current indexing angle is stored in a sequencer or the like and used for the next indexing command. In this way, conventionally, at least one of the type and index angle of the currently attached attachment is stored by a sequencer, etc., so if the attachment to be attached by the attachment attachment command is different from the actual attachment, it will not be effective. .
Also, when the power is turned off, this clears the memory and may cause the memory of the current attachment type and index position to be lost, so that information must be re-entered into the storage device after the power is turned on. , there is a problem that it is complicated. [Purpose of the invention] What is the purpose of the invention? There is no need to indirectly store information regarding the type of attachment attached to the spindle head, the mounting angle to the spindle head, and the weight using a sequencer, etc., and there is no need to indirectly store information regarding the type of attachment attached to the spindle head, the mounting angle to the spindle head, and the weight, and there is a possibility that the command and the attachment actually attached may differ or the power is turned off. To provide an attachment discriminating device for a machine tool that can accurately recognize and discriminate information regarding the type of attachment, its mounting angle with respect to a spindle head, and its weight even if the attachment is attached to a spindle head. [Means and effects for solving the problems] The present invention provides an information recording means, such as a notch, a dog, etc., on the spindle head mounting surface of the attachment, indicating information regarding the type of attachment, the mounting angle with respect to the spindle head, and the weight. A member having mechanical irregularities, or an optical, magnetic, etc. recording member is provided, and a reading means for reading the ordering of the information recording means, such as a limit switch, or an optical, magnetic, etc. recording member is provided on the attachment mounting surface of the spindle head. By attaching a sensor to the spindle head of the attachment, the information recorded in the information recording means is read by the reading means, and the information can be directly read by attaching it to the attachment itself. Even if the command is different from the actual one, and regardless of whether the power is turned on or off, the type of attachment, mounting angle, etc. can always be accurately and quickly determined. [Example] Hereinafter, an example of the present invention will be described based on the drawings. In FIG. 1, a rectangular attachment mounting surface 11 is formed on the front surface of a spindle head 10 of a machine tool. A main shaft 12 is rotatably protruded from the center of the mounting surface 11, and attachment clamp holes 14 are formed near the four corners of the mounting surface 11. Also, a multi-limit switch 20 as a reading means has a plurality of, for example, three, operation buttons 21 on one side of the mounting surface 11, the upper side in the figure.
is installed. Here, when specifying each of the three actuation buttons 21, they are designated by numerals 21A, 21B, and 21C from the right in the figure, and the on-off operation of these three actuation buttons 21A to 21C It is now possible to obtain 3-digit binary information. An angle head 30 serving as an attachment having a tool axis perpendicular to the axis of the spindle head is mounted on the mounting surface 11 of the spindle head 10 so as to be attachable thereto. A rectangular spindle head mounting surface 31 corresponding to the attachment mounting surface 11 of the spindle head 10 is formed on the rear surface of the angle head 30. A tapered shank 32 for transmitting attachment shaft rotation is provided at the center of this mounting surface 31.
This shank 32 is connected to the central tapered hole 13 of the main shaft 12.
is engaged with the main shaft 12 and fixed to the main shaft 12 by a shank fixing mechanism (not shown) provided in the tapered hole 13, so that the rotation of the main shaft 12 is transmitted. Further, near the four corners of the spindle head mounting surface 31, there are pull studs 34 for attachment clamps, respectively, facing the attachment clamp holes 14.
These pull studs 34 are inserted into each clamp hole 14 and clamped by an attachment clamp mechanism (not shown) provided in the hole 14, so that the angle head 30 as an attachment is attached to the spindle head 10. It is becoming fixed. Furthermore, the four sides of the mounting surface 31 are on the same circle with respect to the rotation center (coinciding with the rotation center of the main shaft 12) when the angle head is mounted, and the attachment 3
A notch 41 serving as an information recording means is provided at a position corresponding to the position of the multi-limit switch 20 when it is attached to the spindle head 10 of the multi-limit switch 20. These four side notches 41 have different shapes on each side, 41A, 41B, 41C, 41D,
In the figure, the notch 41A on the upper side corresponds to the center activation button 21B of the multi-switch 20, and the notch 41B on the left side corresponds to the right and center activation buttons 21A, 21B.
C is the left activation button 21C, and the notch 41D on the right side is the same right and left activation button 21A, 21.
The positions corresponding to C are cut out. Therefore, when the multi-limit switch 20 is a normally open type switch, the button 21 corresponding to the notch 41 is turned off, whereas when it is a normally closed type switch, it is turned on. Next, the operation of this embodiment will be explained. To attach the angle head 30 as an attachment to the spindle head 10, as usual, insert the taper shank 32 into the taper hole 13 of the spindle 12 and clamp it, and insert each pull stud 34 into the hole 14 of the spindle head 10. and clamp. With this clamp, any notch of the angle head 30, for example, the notch 41 on the upper side in the figure.
A is fixed facing the multi-limit switch 20, and only the central activation button 21B is not pressed, but the other left and right activation buttons 21A and 21C are pressed, and this signal is sent from the multi-limit switch 20 as shown in the figure. It is output to the NC device that does not operate, and determines whether the ankle head 30 is installed at the relevant installation angle (rotation angle 0 degrees). On the other hand, if the angle head 30 is rotated 90 degrees clockwise (in the direction of the arrow in the figure) and attached to the spindle head 10, then the notch 41B on the left side in the figure is opposed to the multi-limit switch 20. The right and center actuation buttons 21A and 21B are not pressed, and only the left actuation button 21C is pressed, and the 90 degree rotational mounting angle of the angle head 30 is determined based on this signal. Similarly, when rotating 180 degrees clockwise from the illustration, the notch 41C faces the multi-limit switch 20 and receives its signal, and when rotating 270 degrees clockwise, the notch 41D faces the multi-limit switch 20 and receives the signal. When the signal is output, the mounting angles of the angle head 30 of 180 degrees and 270 degrees are determined, respectively. According to this embodiment as described above, the spindle head mounting surface 3 of the angle head 30 as an attachment
1 is provided with a notch 41 as an information recording means, while a multi-limit switch 20 as a reading means is provided on the attachment mounting surface 11 of the spindle head 10.
Since the spindle head 10 of the angle head 30 is
Information regarding its type, attachment angle to the spindle head, and weight can be directly determined by its attachment to the spindle head. Therefore, there is no need for a sequencer, etc. for discrimination, and problems caused by sequencers, such as re-entering information due to power off, installation mistakes due to incorrectly installed attachments, mistakes when re-entering, etc. can be avoided. can be resolved. Also,
The information recording means may also be a simple notch 41, and
Since the reading means may also be the multi-limit switch 20, the overall configuration can be simplified and provided at low cost. Furthermore, by increasing the number of actuation buttons on the multi-limit switch 20, the amount of information can be easily increased, and it is also possible to accommodate many types of attachments. In the above embodiment, the multi-limit switch 20 has three sets, so 2 ³ =
Eight different pieces of information can be distinguished, but the notch 41
If the button is cut out across the three buttons 21A to 21C, the signal will be the same as when the angle head 30 as an attachment is not attached, so for identification purposes when the attachment is attached, it is best to cut out the entire button. This means that seven pieces of information can be used, excluding the following. Therefore, even if four types of notches are used as signals for different mounting angles for each 90 degree angle head 30, the remaining three types can be used for other types of attachments, for example, two different types of rotating face plates, It can be used as a nose cover to cover the mounting surface 11 of the spindle head 0, and different weight correction information can be obtained for different weights. If this is expressed as a table, it will look like Table-1.

【table】

[Effect of idea]

As described above, the present invention has the advantage that information regarding the type of attachment, the attachment angle with respect to the spindle head, and the weight can be determined regardless of the history of the attachment, such as the current attachment state.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing one embodiment of the present invention;
The figure is a flow diagram showing the indexing sequence in another embodiment of the present invention. 10... Spindle head, 11... Attachment mounting surface, 12... Main shaft, 20... Multi-limit switch as reading means, 21... Operation button, 3
0...Angle head as an attachment,
31... Spindle head mounting surface, 41... Notch as information recording means.

Claims (1)

[Scope of utility model registration request] An attachment discriminating device for a machine tool that discriminates various attachments including an attachment that is attached to a spindle head and has a tool axis orthogonal to the axis of the spindle head, the attachment discriminating device for attaching the attachment to the spindle head that has the tool axis. Information recording means provided on the surface of the spindle head and indicating information regarding the type of attachment, attachment angle to the spindle head, and weight, and reading means provided on the attachment mounting surface of the spindle head for reading the contents of the information recording means, An attachment discriminating device for a machine tool, characterized in that recording means are provided every 90 degrees on four sides of a spindle head mounting surface of an attachment, and each recording means is arranged corresponding to the reading means when the attachment is attached.